The general appearance of the inflorescence of A. aberrans is reminiscent of A. parvulus Gagn. and A. linearis Gagn. but the details of the female zone and the presence of a basal velum inside the spathe are unique in the genus. The latter character may turn out to be an aberrant and underdeveloped second spathe, which is a not uncommon phenomenon in Araceae in general. The staminodes show an intermediate condition to the entirely hairlike staminodes in A. cirrifer Stapf, A. hirtus N.E.Brown, A. henryi N.E.Brown and A. nov. spec. (Hettersch., Vietnam). In A. cirrifer similar intermediate staminodes are often found in a small zone between female and male part, often 3-5 clustered, apparently representing an entire male flower. The pattern of stamens reducing and changing into hairs is common in subfamily Aroideae and the presence of this character in Amorphophallus is indicative for a phylogenetic position within or near the base of this subfamily.